US3602364A - Segmented belt - Google Patents

Segmented belt Download PDF

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Publication number
US3602364A
US3602364A US843595A US3602364DA US3602364A US 3602364 A US3602364 A US 3602364A US 843595 A US843595 A US 843595A US 3602364D A US3602364D A US 3602364DA US 3602364 A US3602364 A US 3602364A
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Prior art keywords
segments
belt
flat
snowmobile
hollow
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Expired - Lifetime
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US843595A
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English (en)
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Ralph A Maglio
Donald N Russell
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JP Stevens and Co Inc
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JP Stevens and Co Inc
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/30—Columns; Pillars; Struts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D55/00—Endless track vehicles
    • B62D55/08—Endless track units; Parts thereof
    • B62D55/18—Tracks
    • B62D55/24—Tracks of continuously flexible type, e.g. rubber belts
    • B62D55/253—Tracks of continuously flexible type, e.g. rubber belts having elements interconnected by one or more cables or like elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/32—Arched structures; Vaulted structures; Folded structures
    • E04B1/3205—Structures with a longitudinal horizontal axis, e.g. cylindrical or prismatic structures
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/02—Structures made of specified materials
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/32—Arched structures; Vaulted structures; Folded structures
    • E04B2001/327—Arched structures; Vaulted structures; Folded structures comprised of a number of panels or blocs connected together forming a self-supporting structure
    • E04B2001/3276—Panel connection details

Definitions

  • ABSTRACT A flexible belt formed of hinged segments with two or more segments and preferably separated by spaces.
  • the belt is formed of a suitable plastic, such as an elastomer of the polyurethane type.
  • On one side of each segment there are short integral hollow cylinders and mating cylinders on the other side. When two units are placed together the hollow cylinder portions meet to form a substantially complete cylinder in the same manner as a series of hollow cylinders in a hinge for a door.
  • a pin such as a more or less rigid nylon pin, is passed through the cylinders of theunits to form a hinged structure, and this is repeated until endless flexible belts are produced.
  • the units have flat surfaces abutting opposite flat surfaces at the joint, which prevents the hinge opening any substantial amount.
  • the belts are principally useful as snowmobile treads but are also effective for power transmission or for conveyors.
  • the belts are provided with suitable openings or projections which can engage pulleys or sprockets for drive purposes. Some flexibility in each unit is necessary to give the desired belt contour.
  • SHEET 2 [1F 6 ⁇ lm lkwnllwNvmmmvm INVENTORS, RALPH A. MAGL/O DONALD N. RUSSELL A T TOR/V5 Y SHEET 3 BF 6 INVENTORS. RALPH A. MA 6L /0 BY DONALD N. RUSSELL ATTORNEY PATENTEU Aussl I971 p .1 i i viwmimmmmwww H M IQM PATENTEDAUB31I971 3.602.364
  • Tracks of hinged metal segments have also been used for military-tanks, crawler tractors, and the like. They are heavy and unsuitable for use as belts which must have additional flexibility. Also, as there is no elastic give to the tracks, segmented rail elements must be provided on which a large number of bogie wheels can run. This is, of course, unsuitable for most snowmobile work where generally two sprockets are used with a flexible portion of belt between them.
  • the present invention utilizes an elastic construction in which endless belts are made with hinged segments ;of elastomeric material, such as rubber, polyurethane, and the as textile fabric, glass fibers, metal wires, and the like, so that a cross section through a hinged segment of each belt resembles part of a door hinge.
  • the number of belts which are formed of the segments are two or more, preferably at least three.
  • the belts may be of segments which extend across the full width of the belt, but for many purposes, particularly for snowmobiles tread use, the segments form two or 'more, for example three, individual belts separated by spaces which constitute slots and can grip sprockets for driving purposes; In snowmobiles treads the spaces also" perform the important function that they permit snow to fall through, and the problem of snow packing on a snowmobile track is avoided.
  • the nature of the elastomeric plastic of which the belt segments are made can vary and will depend in'large measure on the use to which the belt is to be put. As flexibility is desired, the elastomer should have a sufficient stretch, and in the case of snowmobile treads they must remain reasonably elastic at quite low temperatures.
  • polyurethanes are particularly important although oil extended rubber, polyepichlorhydrin, and the like may be used. In general, thedesired properties will dictate to a large extent the chemical and physical properties of the elastomer used. For example,
  • diamines and diols namely diamines and diols.
  • Atypical example -.of ahindered diamine is 4, 4' amino 3, 3"chlorodiphenylmethane.
  • This diamine is generally referred to in the trade as Moca, and for brevity this abbreviation will be used in the present specification.
  • the most common diol extender is l, 4 butane diol.
  • the invention is in no sense limited to these typical extenders and other well-known extenders may be used. Forsnowmobile tread work there is some advantage in using Moca.
  • the .nature of the final polyurethane elastomer contains only polyurethane groups when diol extenders are used but alternate the polyurethane groups with ureas when diaminesare employed.
  • the amount of extender used will vary, for example from about '90 percent of the free NCO groups in the prepolymer to 100 percent or slightly over, such as 102 percent, depending on the particular properties desired. Where there is an extension of somewhat over 100 percent, of course this means that there is some free extender present in the final elastomer, which has a certain plasticizing effect. In general the present invention is not in any way limited to the particular elastomer, and the ones mentioned above are merely illustrative.
  • the normal two-step process with the formation of the prepolymer with excess NCO group followed by chainjextension can also be modified by usin'gsingle step processes, for example those in which a diamine is blended with the particular polyether used and then reacted with the diisocyanate. Satisfactory products can be made by this process but the pot life is very short and the manufacturing control is, therefore, more critical because the material has to be molded or cast within 10 or 15 minutes after the formulation, and therefore it is ordinarily desirable to produce polyurethanes by the more customary two-step procedure. It should be noted that as with all known polyurethanes the cast for snowmobile treads, in order to retain stretch and flexibility at' very low temperatures the resin buildings blocks, if
  • polyester based polyurethanes are also usefuL-and in general the present infintion is not limited toany particular polyurethane composition so long as ithas the needed physical properties.
  • polyurethanes are prepared in two steps,'by first forming a prepolymer with the building block resins and as exelastomer proceeds tocross-link somewhat further, for example by atmospheric moisture, and this curing increases the strength and the abrasion resistance of the product.
  • this is nothing new as these procedures are more or less standard practice in producing polyurethane-elastomers, and it is an advantage that the present invention in not limited'to a particular, precise operating procedure.
  • the straight elastomer is usable. Where, however, greater strength is required there may be fibrous reinforcements, such as nylon fabric, glass fibers, or glass fiber fabrics, metal wires, and the like. In such a case a cross section through a hinged segment of a belt resembles that of a tire.
  • the endless belts are made more flexible by the hinge construction with suitable cutouts so that the hinge can bend through a considerable angle.
  • the flexibility of the elastomer is sometimes sufficient and the stretchability or bending confers sufficient flexibility, particularly where sprockets, pulleys, or other elements do not have too small a radius of curvature.
  • the belt presents a practically unbroken surface, which is of importance for some uses, such-as conveyor belts.
  • These belts are also somewhat stronger and may be more suitable for certain power transmission uses where slippage andexcessive belt stretch is undesirable.
  • the segments are also useful for other types of structure, for example I Conveyor belts present two different kinds of problems.
  • the outside which forms the actual conveyor surface, be relatively smooth.
  • the segments have no ridges or cleats and preferably extend across the full width of the belt.
  • Such smooth surface conveyor belts are useful where they convey materials such as packages, containers to be filled, and the like which may have to be bunched together by intermittent barriers or slid off to the side by deflectors.
  • One problem which arises with the conveying of relatively small sizes of materials, such as sand, coal, and the like, is preventing slippage off the edges of the belt, which can be provided with segments having edge lips molded in.
  • Inserts in the form of suction cups and the like may be molded in or may be inserted in suitable holes in the segments where they are to be of different material, such as, for example, a much softer elastomer.
  • the hinged construction provides the enormous advantage that segments can be changed.
  • the track may become torn, and when this occurs there is a very serious problem presented because the ordinary snowmobile endless track has to be mounted over sprockets,
  • segmented character of the belt is encountered where belts of varying length are to be produced. Where endless belts were molded or cast in the past, special equipment had to used for each length of belt. With the present invention very simple castings of segments can be made and belts of any length desired can be assembled by pinning together the desired number of segments. In many cases this represents an important manufacturing advantage which reduces the cost of equipment as well as making it unnecessary to store large numbers of bulky belts or tracks of different lengths. The segments, of course, can be stored and transported compactly and assembled into belts or tracks of any desired length.
  • the hinge construction of the segments of the present invention requires, of course. that there be cylindrical hollows molded in. This. however, presents no problem as molding with suitable mandrels is a common procedure in the art and well-known equipment can be used.
  • the pins employed in the belts according to the present invention may be of various kinds.
  • they may be metal rods, and for certain conveyor belts this permits obtaining great strength with a simple construction.
  • metal rods for certain conveyor belts this permits obtaining great strength with a simple construction.
  • pins of nylon or other strong plastic are usually preferred. Retention of the pins during use is often no serious problem as the friction when a nylon pin is forced through the hollow cylinders of the segment is often sufficient.
  • the end cylinders of each segment may be provided with an enlarged portion and a pin, such as a nylon pin, can be expanded into it. which prevents any loss of pins. This makes it somewhat more difficult to replace segments in the field, for example under the harsh conditions of use of a snowmobile, and for these uses often the unexpanded pins have adequately tight fit and present the advantage that it is a fairly easy matter with suitable tools to remove a pin or to insert a new one.
  • reinforcement such as nylon fabrics, glass fiber fabrics, and the like
  • the reinforcement is needed only in the flat portions of the segments because these are the thinnest portions, the pins reinforcing the hollow cylinders at the edges, and these portions are also thicker in any event. It is much easier to mold in reinforcing material into a flat portion of a segment, and such reinforcement is normally more than adequate to confer the desired additional tensile strength.
  • the reinforcement of the flat portions of the belt segments may, therefore, be considered as a preferred form.
  • unwoven fibers they may be mixed with the polymer prior to molding.
  • FIG. 1 is an isometric of track components with cleats
  • FIG. 2 is an isometric of complete assembled track
  • FIG. 3 is an elevation and partial section through hinge showing pin assembling two components and broken away areas showing reinforcing fabric
  • FIG. 4 is an isometric of a modified form of track components, which will be referred to briefly as new in contradistinction to the older form of track shown in FIGS. 1 to 3;
  • FIG. 5 is an isometric of partial assembly of new track
  • FIG. 6 is an elevation and partial section through hub showing pin assembling two components and broken away areas showing reinforcing fabric
  • FIG. 7 is an isometric of new track for conveyor use illustrating a portion with smooth segments and a-portion with segmentshaving suction cups inserted to prevent slipping on the conveyor;
  • FIG. 8 is an elevation of a new truck with smooth segments for use as a conveyor or power transmission belt
  • FIG. 9 is an isometric of a new snowmobile track with carbide studs
  • FIG. 10 is an isometric of segments to be used for Quonset huts
  • FIG. 11 is an isometric of a Quonset hut
  • FIG. 12 is an isometric of old tract to be used as a column or antenna mast.
  • a prepolymer is formed with-polypropylene glycol of approximately average molecular weight of 2,000, although lower molecular weight glycols may be used where maximum hardness and strength is desired and low temperature flexibility is less important.
  • a prepolymer of the glycol and TDl with a ratio of NCO to OH of from l.75:l to 2:1 is formed at about C., using suitable protection against oxidation, for example by providing a nitrogen atmosphere.
  • Moca is the added in an amount to provide a ratio of NH of 1:1, in other words percent extension. Somewhat lower extensions give softer materials.
  • the prepolymer and diamine are brought together in a casting system using standard commercial casting machines. The pot life is about minutes. Molding times are approximately to 30 minutes, followed by an aftercure of about 1 hour at 100 C. Additional curing takes place at room temperature, and at 22 hours a compression set at 150 F. shows of from 20 to 30.
  • FIGS. 1 to 3 illustrate a typical snowmobile belt or track in which the segments unite to form three transversely connected endless belts with spaces between them.
  • the segments have flat portions 1 on which are integrally molded cylindrical elements 2 and 3. They are of different sizes, on one side a longer piece bridges the spacing between the flat segment and on the other side there are shorter cylinders 3 which fit into the spaces between the cylinders 2 when the segments are abutted.
  • FIG. 3 there is a hollow cylinder formed through which a pin 4 is introduced.
  • the pins are shown partly inserted.
  • the pins are smooth and are held in by friction only once they are inserted.
  • One end cylinder 5 is closed so that the pin cannot stick out once inserted fully.
  • the top short cylinder 6 is shown with an enlarged recess 7, and the pin, after fully inserted, is expanded into it. This is effective with pins which are somewhat deformable, for example nylon pins.
  • the pins are not expanded as the upper short cylinders are the same as the center one and therefore numbered 3 in FIGS. 1 and 2.
  • the cylinders 2, 3, 5, and 6 are shown with cleats 8 on their protruding surfaces, which increase the traction of the whole snowmobile track, as can readily be seen in FIG. 2.
  • These cleats are slightly inclined to give protection both against sideways skidding and also forward traction and braking.
  • Spaces 9 between the segments formingthe three belts result in rather long slots into which the teeth of a driving sprocket or idling sprocket project.
  • These sprockets are not shown as they are standard in snowmobiles and their shape is not changed by the present invention. In other words, the slots formed by the openings 9 permit the teeth of the sprocket to drive the belts positively.
  • any one segment can be removed if damaged and replaced without replacing the whole of the belt or track.
  • tracks of various lengths for snowmobiles of different design can be made up of standard segments to any desired length in segment multiples. It is, therefore, not necessary to stock endless belts of lengths corresponding to eachsnowmobile.
  • FIG. 12 which uses segments of the same general design as in FIGS. 1 to 3 but with uncleated surfaces on the cylinder, illustrates the formation of a square structure. It will be seen in FIG. 12 that this is made up of a number of sets of three segments, two being shown in the drawing.
  • the pins 4 are much longer, and structures are formed which have a considerable amount of strength and are, of course, very light. They are useful, for example, for certain antenna towers and the like and can give and bend under strong winds and when suitably guyed possess considerable strength and protect against quite high winds. While in FIG. 12 there are only four segments, which might be thought of as very short belts, the construction is the same as in FIGS.
  • reinforcements which can be provided in the flat segments if desired. This is illustrated in FIG. 3 in the broken away parts at 10 in the form of a molded in reinforcing fabric, for example of Nylon or F iberglas cloth. In a similar manner, the reinforcements can be molded into a somewhat different design of segments shown in later figures and are illustrated specifically in broken away portions in FIG. 6.
  • FIGS. 4 to 9 illustrate a different form of hinge, F 16s. 4 to 6 and 9 being suitable for snowmobile tracks and FIGS. 7 and 8 conveyor belts.
  • the pin and cylinder construction forming hinges is similar to the old style of FIGS. I to 3 and 12, and the pins and their mating cylinders are designated with the same reference numerals although the shape is somewhat different. It will be seen best in FIG. 4 that there are a larger number of short cylinders'3 and they are molded onto the relatively flatter sections 1 in a somewhat different manner so that they cannot bend as far. This is illustrated by FIG. 4 which shows a portion of a disassembled snowmobile track, and at the left it will be seen that'the hinges cannot bend very far.
  • FIG. 5 illustrates a-portion of a snowmobile track
  • the amount of bending of the hinge is negligible and that the flexibility of the elastomer is all that is permitting the bending.
  • the radius of curvature of driving or idler sprocket is quite large, this creates no problem.
  • FIGS. 4 to 6 also illustrate-a different pin structure in which there are no closed ends of the cylinders. Here the pins are held in by friction.
  • FIG. 4 is an exploded view showing thepins starting through the cylinders.
  • FIGS. 4 to 6 and 9 another feature is illustrated, namely that of an additional rib 1] which gives added traction for the snowmobile.
  • the traction is not better essentially thanin the tracks of FIGS. 1 to 3 but the segments are much wider for the same amount of traction, and it is this greater width that permits more flexibility of each segment, which again is shown at the left in FIG. 5.
  • The'separate rib also permits a further modification, which is illustrated in FIG. 9, in which there are inserted carbide tipped studs 12 in holes in the 'ribs.
  • the studs are shown as protruding quite a distance above the surface of the elastomer, whereas normally, as is well known, in the case of studded snow tires they protrude but little above the elastomer since they do not have to be very long to grip the ice.
  • the drawing is less clear, and therefore in FIG. 9 the studs are shown as protruding an exaggerated amount.
  • FIG. 6 also illustrates another feature.
  • ridges 13 which strengthen the sides and therefore help in providing longer life as far as wear on the sprocket teeth is concerned.
  • These ridges also increase the resistance to sideways slipping or skidding in snow and so perform a dual function.
  • FIGS. 7, 8 and 9 illustrate a somewhat different type of belt with the flat segments 1 extending all the way across the full width of the belt.
  • This type of belt is useful as a conveyor belt, as illustrated in FIG. 7, or a power transmission belt, as illustrated in FIG. 8.
  • FIGS. 4 and 5 An essential difference from the belts described in the preceding figures, for example FIGS. 4 and 5, is that the ridges 11 are on the inside of the belt instead of the outside and so are the hollow portions through which thev pins pass. As they are of essentially the same design and are performing a similar function, the hollow members through which the pins pass to form a hinge are given the same reference numerals as in the other figures. In a similar manner the pins 4 also carry the same reference numbers.
  • the ridges l1 and the ridge formed by the hinge elements 2 and 3 in effect are somewhat widely spaced teeth and they cooperate with a sprocket 14 of suitable design. This is shown in FIG. 8.
  • the spacing between hinges may be somewhat less than where a snowmobile track is involved. This has the additional advantage that even though the new style of belt does not have hinges that can turn through a large angle, the belt is still more flexible at the hinge than in the middle of a segment; and therefore, where the hinges are somewhat more closely spaced, the problem of sprockets of moderate diameter is not so acute.
  • the outer surface of power transmission belts is smooth, as is shown in FIG. 8.
  • the belt of course, in the new style has no openings at the hinges and, therefore, moderately fine material, such as sand, can be conveyed without falling through the belt.
  • the question of the smoothness of the conveyor belt outer surface is involved in the nature of the things being moved on the conveyor. For example, some conveyors are used for moving packages or containers to be filled which must periodically be held up or, in the case of packages, deflected from the conveyor, and so for this type of use a smooth outer surface is needed so that the conveyor can move continuously and slide under the packages or other things that are being conveyed.
  • FIG. 7 shows at the left-hand side the modification with suction cups, at the righthand side the smooth surface.
  • a conveyor will usually have a uniform surface, that is either all smooth or all with suction cups, but by showing both variants on the same figure of the drawing the number of drawings is reduced.
  • a segmented belt or track suitable for operation in contact with particulate matter on one side of the belt only comprising a plurality of substantially equal length flat segments along the length of the track, each segment being provided with separated, mating, hollow elements on both transverse edges of the segment and the hollow elements being unitarily cast of an elastomer and the hollow elements on the two edges whereby the ed es of each segment formin the belt are hel against deflections up or own, thus preventing passage of particulate matter through the belt at the outer edges 2.
  • a snowmobile track according to claim 1 in which the hollow members project beyond the flat segments to form a traction ridge transversely of the belt.
  • a snowmobile track or belt according to claim 2 in which at least one additional transverse projecting ridge is cast across the flat portions of the segments, the projection being on the same side as that of the hollow elements.
  • a belt or track according to claim 1 in which the flat portions of the segments are reinforced with embedded fibers or fabrics.
  • An endless belt according to claim 7 in which at least one transverse rib is cast in the flat portion of the segment extending out onto the inside of the belt.
  • a conveyor belt according to claim 7 is which the outer surface is smooth and continuous.
  • a belt or track according to claim 1 in which the flat segments form a belt with slots when they are pinned together and some of the hollow elements are of sufficient length to bridge the spaces between the flat segment sections so that each segment is a unit and slots are formed between the portions of the flat segments.
  • a segmented snowmobile track according to claim 12 in which the hollow elements project on one side of the segments and form traction ridges transversely of the segments, the slots between the portions of flat parts of the segments being dimensioned to mate with snowmobile driving sprockets.

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US843595A 1969-07-22 1969-07-22 Segmented belt Expired - Lifetime US3602364A (en)

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US (1) US3602364A (de)
JP (1) JPS4923174B1 (de)
AT (1) AT311200B (de)
BE (1) BE753480A (de)
CH (1) CH525797A (de)
DE (1) DE2036465C3 (de)
FR (1) FR2053062B1 (de)
GB (1) GB1292173A (de)
IE (1) IE34607B1 (de)
NO (1) NO128057B (de)
SE (1) SE382027B (de)

Cited By (53)

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US3700287A (en) * 1971-06-25 1972-10-24 Baychem Corp Tread member and endless tracks made therefrom
US3726569A (en) * 1971-08-18 1973-04-10 Stevens & Co Inc J P Pin fastening for segmented snowmobile tracks
DE2322343A1 (de) * 1972-05-04 1973-11-22 Uniroyal Inc Endlosverbindung fuer zahnriemen und verfahren zu deren herstellung
US3819239A (en) * 1970-11-04 1974-06-25 Twinpak Ltd Endless track
US3833998A (en) * 1972-05-04 1974-09-10 Uniroyal Inc Method of forming a splice in a toothed power transmission belt
US3870141A (en) * 1970-08-13 1975-03-11 Laitram Corp Modular belt
US4138011A (en) * 1976-04-28 1979-02-06 The Laitram Corporation Non-pivotal modular conveyor belt and modular links therefor
US4170281A (en) * 1977-06-30 1979-10-09 The Laitram Corporation Extrudable flexible modular tooth driven conveyor belt
US4438838A (en) * 1981-05-01 1984-03-27 Rexnord Inc. Conveyor chain for use with fingered transfer plate
EP0288409A1 (de) * 1987-04-15 1988-10-26 Rexnord Corporation Zusammenbau von Fördererketten
US4915895A (en) * 1987-11-30 1990-04-10 General Motors Corporation Method for making a composite tread for track-laying vehicles
US4941568A (en) * 1987-10-06 1990-07-17 The Laitram Corporation Accurate tracking center driven open area belt
US4971191A (en) * 1987-10-06 1990-11-20 The Laitram Corporation Accurate tracking center driven open area belt
US4993543A (en) * 1977-05-31 1991-02-19 The Laitram Corporation Link chain belt
US5020659A (en) * 1987-04-15 1991-06-04 Rexnord Corporation Conveyor chain assembly
US5024321A (en) * 1980-08-19 1991-06-18 Laitram Corporation Modular center drive conveyor belt
US5083659A (en) * 1984-02-06 1992-01-28 The Cambridge Wire Cloth Co. Plastic conveyor belt system with improved product support
US5096053A (en) * 1987-04-15 1992-03-17 Rexnord Corporation Conveyor chain assembly
US5123524A (en) * 1980-08-19 1992-06-23 The Laitram Corporation Modular center drive conveyor belt
US5125504A (en) * 1991-03-08 1992-06-30 Rexnord Corporation Modular conveyor chain having open hinge pin construction
US5197591A (en) * 1992-02-11 1993-03-30 Ashworth Bros., Inc. Replaceable snap-on modular overlay for rod and link turn-curve conveyor belts
US5497874A (en) * 1994-06-20 1996-03-12 Span Tech Corporation Article engaging insert for modular link conveyor
US5676436A (en) * 1995-03-31 1997-10-14 Caterpillar Inc. Positive drive endless rubber belted track
US5960933A (en) * 1997-06-23 1999-10-05 Tetra Laval Holdings & Finance, Sa Conveyor belt for non-slip material handling
WO2000037337A1 (en) * 1998-12-21 2000-06-29 Rexnord Corporation Fiber filled chain link for a modular conveyer chain
US6296328B1 (en) 1998-07-06 2001-10-02 Stephen Wilkinson Tracks for all terrain vehicles
US6425479B1 (en) * 1999-05-05 2002-07-30 Habasit Ag Conveying apparatus having a modular conveying belt and at least one toothed drive wheel
US6523915B1 (en) * 1999-07-14 2003-02-25 Bridgestone Corporation Elastic endless crawler
US6530626B1 (en) 1999-06-08 2003-03-11 Soucy International Inc. Field-repair device for a rubber-band track
WO2003040010A2 (en) * 2001-11-08 2003-05-15 The Laitram Corporation Polymer hinge pins in modular conveyor belts
US20030192777A1 (en) * 2000-05-25 2003-10-16 Dieter Guldenfels Radius conveyor belt
US6659573B1 (en) * 1999-04-27 2003-12-09 Terex-Demag Gmbh & Co. Kg Wheel and track for a crawler vehicle undercarriage
US20040211651A1 (en) * 2003-04-28 2004-10-28 Ramsey Products Corporation Silent modular conveyor and conveyor links
US20050168068A1 (en) * 2004-01-28 2005-08-04 Camoplast Inc. Reinforced stud mount
US20050274590A1 (en) * 2001-08-03 2005-12-15 C. U. E., Inc. Flight for a conveyor
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US20070084699A1 (en) * 2005-10-14 2007-04-19 Chris Smith Conveyor belt cleaning apparatus and system
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USRE40248E1 (en) * 2003-02-10 2008-04-22 Uni-Chains A/S Wide chain link conveyor structure
US20080174176A1 (en) * 2007-01-16 2008-07-24 Polaris Industries Inc. Light weight track for a snowmobile
US20090224598A1 (en) * 2006-02-21 2009-09-10 Pascal St-Amant Method for compression moulding reinforced thermoplastic article
US20100078296A1 (en) * 2008-09-26 2010-04-01 Laitram, L.L.C. Living-hinge conveyor belt
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US8474607B2 (en) 2010-11-19 2013-07-02 Ramsey Products Corporation Integrated multi-functional links for chain link conveyor and method
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US10106325B2 (en) 2017-03-06 2018-10-23 Joy Global Underground Mining Llc Chain conveyor with cast sections
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US7134545B1 (en) 2006-02-16 2006-11-14 Chris Smith Conveyor apparatus and system
US20090224598A1 (en) * 2006-02-21 2009-09-10 Pascal St-Amant Method for compression moulding reinforced thermoplastic article
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US9475644B2 (en) 2009-04-30 2016-10-25 Joy MM Deleware, Inc. Sound dampening conveyor chain flight
US9834383B2 (en) 2009-04-30 2017-12-05 Joy Mm Delaware, Inc. Sound dampening conveyor chain flight
US10150617B2 (en) 2009-04-30 2018-12-11 Joy Global Underground Mining Llc Sound dampening conveyor chain flight
US20110037313A1 (en) * 2009-07-17 2011-02-17 Camoplast Inc. Segmented or other elastomeric endless track for traction of a vehicle
US11111342B2 (en) 2009-12-01 2021-09-07 Gates Corporation Polyurea-urethane cord treatment for power transmission belt and belt
US8474607B2 (en) 2010-11-19 2013-07-02 Ramsey Products Corporation Integrated multi-functional links for chain link conveyor and method
US10414594B2 (en) 2017-03-06 2019-09-17 Joy Global Underground Mining Llc Chain conveyor
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US10442627B2 (en) 2017-03-06 2019-10-15 Joy Global Underground Mining Llc Chain conveyor and coupler link for same
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US10981728B2 (en) 2017-03-06 2021-04-20 Joy Global Underground Mining Llc Chain conveyor
US10106325B2 (en) 2017-03-06 2018-10-23 Joy Global Underground Mining Llc Chain conveyor with cast sections
US11440736B2 (en) 2017-03-06 2022-09-13 Joy Global Underground Mining Llc Chain conveyor
US11530095B2 (en) 2017-03-06 2022-12-20 Joy Global Underground Mining Llc Chain conveyor and link for same
US20210229763A1 (en) * 2020-01-24 2021-07-29 Caterpillar Inc. Track shoe with wear resistant grouser
US11697462B2 (en) * 2020-01-24 2023-07-11 Caterpillar Inc. Track shoe with wear resistant grouser
US11858745B2 (en) 2021-01-28 2024-01-02 Joy Global Underground Mining Llc Chain conveyor and link for same

Also Published As

Publication number Publication date
SE382027B (sv) 1976-01-12
DE2036465A1 (de) 1971-02-18
FR2053062A1 (de) 1971-04-16
DE2036465B2 (de) 1981-02-26
AT311200B (de) 1973-11-12
NO128057B (de) 1973-09-24
JPS4923174B1 (de) 1974-06-13
CH525797A (de) 1972-07-31
IE34607L (en) 1971-01-22
GB1292173A (en) 1972-10-11
BE753480A (fr) 1970-12-16
IE34607B1 (en) 1975-06-25
DE2036465C3 (de) 1981-11-05
FR2053062B1 (de) 1973-04-27

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